Relationship Between the Atterberg Limits and Clay Content

Polidori, Ennio

doi:10.3208/sandf.47.887

Cited by 103 publications

(35 citation statements)

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“…This also shows that, in the weathering profiles, the soil Atterberg limits increased with the increase in clay content, which is also reported by several other studies (Polidori, 2007;Baskan et al, 2009;Keller and Dexter, 2012). This result may be due to the effect of clay on soil plasticity in changing the arrangement of soil particles and cation exchange capacity.…”

Section: Particle-size Distribution (Psd)supporting

confidence: 76%

Soil Atterberg limits of different weathering profiles of the collapsing gullies in the hilly granitic region of southern China

et al. 2017

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Abstract. Collapsing gullies are one of the most serious soil erosion problems in the tropical and subtropical areas of southern China. However, few studies have been performed on the relationship of soil Atterberg limits with soil profiles of the collapsing gullies. Soil Atterberg limits, which include plastic limit and liquid limit, have been proposed as indicators for soil vulnerability to degradation. Here, the soil Atterberg limits within different weathering profiles and their relationships with soil physicochemical properties were investigated by characterizing four collapsing gullies in four counties in the hilly granitic region of southern China. The results showed that with the fall of weathering degree, there was a sharp decrease in plastic limit, liquid limit, plasticity index, soil organic matter, cation exchange capacity and free iron oxide. Additionally, there was a gradual increase in liquidity index, a sharp increase in particle density and bulk density followed by a slight decline, a decrease in the finer soil particles, a noticeable decline in the clay contents, and a considerable increase in the gravel and sand contents. The plastic limit varied from 19.43 to 35.93 % in TC, 19.51 to 33.82 % in GX, 19.32 to 35.58 % in AX and 18.91 to 36.56 % in WH, while the liquid limit varied from 30.91 to 62.68 % in TC, 30.89 to 57.70 % in GX, 32.48 to 65.71 % in AX and 30.77 to 62.70 % in WH, respectively. The soil Atterberg limits in the sandy soil layers and detritus layers were lower than those in the surface layers and red soil layers, which results in higher vulnerability of the sandy soil layers and detritus layers to erosion and finally the formation of the collapsing gully. The regression analyses showed that soil Atterberg limits had significant and positive correlation with SOM, clay content, cationic exchange capacity and Fe d , significant and negative correlation with sand content and no obvious correlation with other properties. The results of this study revealed that soil Atterberg limits are an informative indicator to reflect the weathering degree of different weathering profiles of the collapsing gullies in the hilly granitic region.

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Section: Particle-size Distribution (Psd)supporting

confidence: 76%

Soil Atterberg limits of different weathering profiles of the collapsing gullies in the hilly granitic region of southern China

et al. 2017

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“…In particular, it has been observed (Polidori, 2007(Polidori, , 2009) that the W L and CF of the tested soil were found to be the best parameters to appraise soil properties (index and intrinsic mechanical parameters, such as the residual shear friction angle).…”

Section: Soil Typementioning

confidence: 96%

On the intrinsic compressibility of common clayey soils

Polidori¹

2014

European Journal of Environmental and Civil Engineering

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The present research, investigates the index properties and the oedometer intrinsic compressibility of five inorganic soils containing platey clay minerals and their respective mixtures with fine silica sand. The research purpose is to: (i) establish a quantitative relationship between the liquid limit, the clay percentage and the intrinsic parameters of compressibility valid for the common inorganic soils reconstituted at an initial water content equal to the liquid limit, (ii) propose a procedure to build the intrinsic compression line for each soil investigated in order to evaluate the soil structure at the natural state. Precisely, on the basis of the liquid limit and clay percentage (not too low) of a soil, the intrinsic compressibility parameters and the coordinates of the intrinsic compression line, proposed as intrinsic state of reference, can be calculated. Hence, plotting both the oedometer compression curve of an undisturbed soil sample and the relative calculated intrinsic compression line, the natural soil structure derived from its geological history can be estimated. Since the non-platey clay minerals have characteristics very different from that of platey clay minerals, they are excluded from the present research as the organic soils are.

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“…Consequently, considerable effort has been placed on 37 characterisation (Dershowitz and Einstein, 1988;Aydin, 2000) and modelling (e.g. Brown & 38 Bruhn, 1998;Oda, 1982Oda, , 1986Oda, , 1988) of fractures and fracture networks. A wide variety of 39 M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 3 (Berkowitz, 2002).…”

Section: Introduction 26mentioning

confidence: 99%